| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.jackrabbit.oak.plugins.identifier; |
| |
| import static org.apache.jackrabbit.JcrConstants.JCR_UUID; |
| import static org.apache.jackrabbit.JcrConstants.MIX_REFERENCEABLE; |
| |
| import org.apache.jackrabbit.oak.commons.PathUtils; |
| import org.apache.jackrabbit.oak.plugins.nodetype.TypePredicate; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| |
| /** |
| * Simple utility class for lazily tracking the current identifier during |
| * a tree traversal that recurses down a subtree. |
| */ |
| public class IdentifierTracker { |
| |
| private final TypePredicate referenceable; |
| |
| private final IdentifierTracker parent; |
| |
| private final String name; |
| |
| private String identifier; |
| |
| public IdentifierTracker(NodeState root) { |
| this.referenceable = new TypePredicate(root, MIX_REFERENCEABLE); |
| this.parent = null; |
| this.name = null; |
| |
| String uuid = root.getString(JCR_UUID); |
| if (uuid != null && referenceable.test(root)) { |
| this.identifier = uuid; |
| } else { |
| this.identifier = "/"; |
| } |
| } |
| |
| private IdentifierTracker( |
| IdentifierTracker parent, String name, String uuid) { |
| this.referenceable = parent.referenceable; |
| this.parent = parent; |
| this.name = name; |
| this.identifier = uuid; // possibly null |
| } |
| |
| public IdentifierTracker getChildTracker(String name, NodeState state) { |
| String uuid = state.getString(JCR_UUID); |
| if (uuid != null && !referenceable.test(state)) { |
| uuid = null; // discard jcr:uuid value of a non-referenceable node |
| } |
| return new IdentifierTracker(this, name, uuid); |
| } |
| |
| public String getIdentifier() { |
| if (identifier == null) { // implies parent != null |
| identifier = PathUtils.concat(parent.getIdentifier(), name); |
| } |
| return identifier; |
| } |
| |
| } |